QTR-1A reflective sensor - MSX module - 2pcs. - Pololu 2458*

Two modules with QTR reflective sensors. They have an analog output. The supply voltage is 5 V.

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In stock, shipping 24 hours!

Price 17,90 zł


  • Supply voltage: 5.0 V
  • Current consumption: 20 mA
  • Output: analog voltage
  • The range of the output signal: from 0 to supply voltage of 5 V
  • The optimal distance of the sensor's operation: 3 mm
  • The maximum distance of the sensor's operation: 6 mm
  • Weight: 0.25 g
Details in the documentation.


The set includes two QTR1-A sensor with goldpin straps: straight and corner.


Method of application

  • Connecting the sensor's output to the analog-to-digital converter (for example, integrated in the microcontroller or analog input in Arduino).
  • Connection using the comparator directly to the I/O pins.
  • Using the built-in in some microcontrollers, internal comparator.


The product is compatible with Arduino

The manufacturer has prepared a library for microcontrollers from the AVR family for Arduino users which facilitates the usage of the sensor.


Diagram of the system


Schemat podłączenia czujnika QTR-1A

The scheme of connecting the QTR-1A sensor on the board. Resistor of 150 Ω limits the current flowing through the LED that emits the infrared. The 47  resistor is used to pull-up the collector output to the VIN supply voltage.


Posting the payment for the order on our account on a business day up to 13:00 means sending the goods on the same day!


The time of payment depends on the hours of ELIXIR session of the sender's bank and the recipient of the transfer (more information on this subject, for example on the website


The table presents available forms of delivery in Poland


Carrier and

Bank wire

by cash


Poczta Polska

terms of service

9,90 PLN17,90 PLN1-3 days

Kurier GLS

terms of service

14,90 PLN22,90 PLN

1-2 days

Paczkomaty 24/7 

terms of service

12,90 PLN-1-3 days

If the amount to pay for products exceeds 500 PLN
Delivery is for free!


  • Free delivery of orders over 500 PLN does not apply to parcels addressed outside of Poland.
  • Free delivery does not apply when changing orders.
  • The delivery period is counted in working days from the date of dispatch of the order.